Lex....allow me one more post to answer this ridiculous post which doesn't even warrant a response, but I will give one to satisfy those who say there is nothing valuable on this board.
For starters, acquisitions are made with cash, stock, or a combination of both. Market cap is the determinent as to the ability of one institution to buy another.
Shelf offerings simply allow institutions to get access to capital within a matter of days in order to deal with such issues as working capital, debt repayment, balance-sheet restructuring, and yes, acquisitions. Take some time to do some research. You could have saved yourself some time by not posting your ridiculous message had you done research in advance.